I know you can get this from the Beta Pack, but I figured people may just want these alone.
This is also a port from the workshop.
Thanks JayXsane for originally making the mod, it seems all other L4D1 to L4D2 special infected mods are broken. You should probably go to his profile and thank them, or else this mod wouldn't even be here! Then we'd be forced to *gasp* play L4D1!
Thanks Ergo Proxy on Steam for putting this on the Workshop.